Remove duplicate rows leaving oldest row Only?

Question

I have a table of data and there are many duplicate entries from user submissions.

I want to delete all duplicates rows based on the field subscriberEmail

Answer 1

How about this, now you don't have to create any temporary tables using self joins

DELETE u1 FROM users u1, users u2 WHERE u1.id < u2.id AND u1.email = u2.email

To check if there are any duplicate records in table

SELECT count(*) as Count, email FROM users u group by email having Count > 1